How to create a field in customize and show that in header.php?

I am new to WordPress coding and learning this from stackexchange,
I am trying to create one WordPress website from scratch, in header I want to show contact information for example phone number,
I want to create a field in customize and want to display the value in header.php.
Is there any guide or tutorial for that? Any help will be appreciated. Thanks a lot!!
*don’t want to use plugin

Probleme shortcode with list author

I have created a list of my contributors for my website it works well. I’m trying to do this with a shortcode in my functions.php. The list appears well. But when I want to place it in my theme in any page, it appears before the content whereas I want it to be at the bottom of the page of its appropriate page template. I can’t seem to find my mistake

WooCommerce display price before add to cart

I’m trying to make the WooCommerce product price display before the “add to cart” button, however, I cant seem to get the price to display. Here is the code I’m using in my functions.php add_action( 'woocommerce_before_add_to_cart_button', 'misha_before_add_to_cart_btn' ); function misha_before_add_to_cart_btn(){ echo '<div class="btn-price">'. $product->get_price_html().'</div>'; } Please would someone be able to point out where I’m … Read more